cast-iron

a cast-iron promise or arrangement is one that can be trusted completely (always before noun) No new business comes with a cast-iron guarantee of success.

Common Names:

Name	Pronounced	Usage
Sumati	-	Hinduism, Indian, Hindi
Donatella	do-nah-TEL-lah	Italian
Elroy	EL-roi	English
Gregg	[greg]
Fishke	-	Yiddish
Ayotunde	-	Western African, Yoruba